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In this paper, we present a new beacon recognition method for wireless sensor devices to access beacon-enabled WSN with low-power consumption. At first, we explain necessity of the low-power beacon recognition in the beacon-enabled wireless sensor networks. By realigning network resources, we catch that beacons are in the same position in each BI (beacon interval). Then, we propose how to switch operation...
In this paper, we investigate an error performance issue of a multiple-input multiple-output (MIMO) broadcast system with zero-forcing (ZF) precoder. We propose a ZF-precoded scheduling system for MIMO broadcast transmission which selects a user set with the maximum effective signal to noise ratio (SNR) through feedback information. The tight closed-form expression of the proposed scheduling system...
In this paper, we present a new MIMO-OFDM system model with a zero forcing (ZF) receiver for obtaining higher diversity order than a conventional scheme by selecting the transmit antennas. The difference of the proposed scheme compared to the conventional scheme is that the number of selected transmit antennas may change (i.e., multimode antenna selection scheme) for each subcarrier. When we apply...
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